Connection-plate for dynamos



(N0 Model.) 2 Sheets-Sheet 1.

J. J.-WO0D. v CONNECTION PLATE FOR DYNAMOS.

No. 487,462. Patented Dec; 6, 1892.

FIG, I.

WITNESSES: INYENTOR:

By 111's Attorneys,

(No Model.) 2 Sheets--Sheet 2. J. J. WOOD.

' CONNECTION PLATE FOR DYNAMOS. No; 487,462.

Patented Dec. 6, 1892.

INVENTOR: %.%W By his Atzomeys, cm'hfm WITNESSES: I N M UNITED STATES PATENT @rmcn.

JAMES J. WOOD, OF FORT WAYNE, INDIANA.

CONNECTION-PLATE FOR DYNAMOS.

SPECIFICATION forming part of Letters Patent No. 487,462, dated December 6, 1892.

Application filed April 18, 1892. Serial No. 429,541. (N0 model.)

To all whom it may concern:

Be it known that 1, JAMES J. WOOD, a citizen of the United States, residing at Fort Wayne, in the county of Allen and State of Indiana, have invented certain new and useful Improvements in Connection-Plates for Dynamos, of which the following is a specification.

This invention provides certain improvements in the means for effecting the connections between the flexible cables leading from the commutator-brush holders and the fieldmagnetexciting coil and line-circuit. The line-circuit and the main and shunt-field-exciting coils have their terminals connected to terminal connectors constructed as or connected with fuse-blocks, the whole being so arranged as to afford the most convenient and accessible connecting devices.

Figure 1 of the accompanying drawings is an end elevation of one construction of dynamo to which my invention is applied. The dynamo here shown is a machine designed especially for the generation of electric energy for driving cars on electric railways, and is known as the Wood-railway generator. The remaining figures illustrate connectionplates and details drawn to enlarged scales. Fig. 2 is a front elevation of the terminal connections and fuse-blocks. Fig. 3 is an under side plan thereof. Fig. 4 is a side view of the right-hand part of Fig. 2. Fig. 5 is a front and side View of one of the parts of the fuse-block, and Fig. 6 includes similar views of another part thereof. Fig. 7 shows in detail one of the terminal connection-sockets.

Referring to Fig. 1, let A designate the armature, and F the field-magnet as a whole. In the construction shown the field-magnet is constructed of two castings B B, united by an iron core 0, bolted between them. .Each casting B is formed with wide-spreading legs a a and with its body extending upwardly from the core O and curving inwardly, as shown in Fig. 1, the upper ends of the two castings approaching each other and being bored out to form the polar ends N S of the field-magnet. The armature-shaft E is mounted in bearings formed in cross-heads D, held between outwardly-projecting arms b b. Any

other construction of dynamo and armatureshaft mounting may, however, be substituted. The armature -sl1aft carries a commutator consisting of segments connected to the terminals of the armature-coils in the manner commonly employed with Siemens drum or Gramme ring armatures, and the currents are taken 011' by stationary brushes 6 6, carried in brush-holders H H, mounted on studs carried by a brush-holder yoke J, all in general of usual construction and arrangement. The yoke J is provided with a handle, and is so mounted that it may be turned to difierent positions to vary the lead of the brushes, being held with sufficient friction to retain it in any position at which it may be left. For conducting the electric currents from the brush-holders flexible cables M M are provided connected at one end through suitable socket-pieces with the insulated studs on which the brush-holders are mounted, so as to be in electric communication with the respective brush-holders, and connected at their other ends to the respective connection-plates O and O, where the circuit connections with the field-magnet coils and external circuit are made. The flexibility of the cables enables them to adapt themselves to the varying positions to which the brushes may be adjusted. In the drawings I have shown the cables M M as duplicate, so that they afford the requisite conductivity with greater flexibility than if the entire area of conducting-wires were inclosed in one cable.

In my improved dynamo the terminal fieldshunt and fuse connections are all made on two insulating connection-plates O O, fastened against the field-magnet in the positions shown best in Fig. 1, so that all the connections are readily accessible and visible at a glance. The plates 0 O are of insulating material, being preferably blocks of wood or slate fastened by screws q q to the dynamoframe, and to which the several terminal connections are fastened by screws or otherwise. The cable M leads to the connection-plate 0, where its end is fastened in the socket-piece 19, while the cable M leads to the connectionplate 0, and its end is fastenedinthe socketpiece 19'. The direct or series circuit passes from cable M and its socket p to fuse-connector P, by fuse-wires 'r r to fuse-connector P, thence by wire 8 through the main or series field-exciting coil Q, Fig. 1, wound on the core 0, which terminates in wire 3, thence by fuse-connector P fuse-wires r r, and fuseconnector P which constitutes a terminal binding-post, to the line-wire w, and thence over the line, returning by wire to to terminal connector P constituting the opposite binding-post, and through socket 19 thereof to cable M, all as shown in Fig. 1. The shuntcircuit passes from connector P by wire i to rheostat R, returning by wiretto the shunt connection'plate T, thence by wire 25 to the shunt-field-exciting coils T T, terminating in wire i which is joined to the connector P Referring to Figs. 2 to 7, I will now describe the construction of the several connectors. The terminal connector P is formed with a socket p, Fig. 5, in whichthe end of the cable M is fixed, while its lower portion constitutes a binding-clamp for the fuse-wires r 7. All four of the fuse-connectors P, P,.P, and P are constructed alike at their lower portions for engagement with the fuse-wires, each having a cap W, as shown in Figs. 5 and 6, drawn down by a screw, and with coinciding grooves in the abutting sides of the cap and connector for receiving the ends of the wires. The connector P (litters from the connectors P, P and P only in having the socket p, which is omitted from the latter. The latter, however, are provided with socket-pieces q, one of which is shown in detail in Fig. 7, for connecting the respective wires 5, s, and w. The ends of the wires being soldered into these socket-pieces, the latter are engaged to the connectors P, P, and P by slipping their perforated eyes over the screw-studs r of the connectors and screwing down nuts thereon to clamp them tightly. The terminal connector P is constructed with a socket-piece p for connection with the cable M, and it has applied to it one of the socket-pieces q for connecting it with the terminal line-wire w. The shunt terminal wires 2? and t are con nected to the terminal connectors P and P by clamp-screws and washers and are connected in like manner to the intermediate connection-piece T ,which consists, merely, of

a flat metal plate fastened by screws to the connection-plate O. The socket-pieces q q are made with simple sockets, into which the ends of the wires are soldered, the wires connected to these sockets being immovable. The flexible cables M M, connected in the sockets 1910 by reason of their flexure, require a more perfect connection. a To this end the sockets p p are constructed to receive the insulation of the cables within them. Ordinarily such terminal connections have sockets receiving the wire core only of the cable, the insulation stopping at the end of the socket; but with such a construction the cable is liable to too great flexure at the point of j unction with the socket-piece, since the insulated portion of the cable is in no way supported; but by my construction the socket-piece is formed with a large socket at the outer end, receiving and fitting the insulated end portion of the cable, and with a deeper socket of similar diameter fitting and united to the conducting-core only of the cable, preferably by running in solder. By thus fastening the end insulation of the cable tightly in the outer socket the flexure of the cable at the denuded portion is prevented, thereby greatly reducing the liability to impairing the connection between the end of the cable and the socketpiece. The fitting of the cable into the socket-piece is clearly shown at the right in Fig. 2.

By my improved construction of connectionplates the circuit connections and fuse connections are rendered detachable independently of one another, so that the alteration and renewal of any circuit connection does not disturb the others. All the connections are clearly visible on the exterior, where they are easily accessible, and the fuse-wires are arranged beneath the other connections, so that in case they are melted off they fall away free from the other conducting parts. The minimum of fastening devices is also employed.

I claim as my invention the following-dc fined novel features, substantially as hereinbefore specified, namely:

1. In a dynamo, insulating connection-plates O 0, applied to the frame thereof, and conducting terminal and fuse connectors carried thereby, adapted to connect with the respective commutator-brush cables, field-coil terminals, and line-terminals.

2. In a dynamo, the combination of commutator-brush cables M M, conducting-connectors P and P joined to said cables, the connector P adapted for connection with the line-circuit, the other line-circuit terminal P and the field-coil connections interposed between the connectors P and P 3. In a dynamo, the combination of commutator-brush cables M M, conducting-connectors P and P joined to said cables, the connector P and connectors P, P, and I, constructed as fuse connections, and the connectors P and P adapted for connection with the line-circuit.

4. In a dynamo, insulatingconnection-plates O 0, applied to the frame thereof, fuse-connectors P and P, carried by one of said plates, fuse-connectors P and P carried by the other, and line and commutator connections carried by said plates.

5. In a d ynamo,insulating connection-plates O 0, applied to the frame thereof, fuse'connectors P and P, carried by one of said plates, fuse-connectors P and P, carried by the other, field-magnet coil Q, connected between said connectors P P, a terminal connector P, the

my name in the presence of two subscribing witnesses.

JAMES J. WOOD.

Witnesses:

CHAS. C. MILLER, ROBERT F. HARDING. 

